Abundance of interstellar carbon toward Zeta Ophiuchi

Abundance of interstellar carbon toward Zeta Ophiuchi

We report on the detection of the weak intersystem transition of semiforbidden C II 2325 A in the sight line toward Zeta Oph using the Ech-B mode of the Goddard High-Resolution Spectrograph. The measured equivalent width of the semiforbidden C II line is W(lambda) = 0.52 +/- 0.12 mA, implying a C II...

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Veröffentlicht in:The Astrophysical journal 1993-01, Vol.402 (1), p.L17
Hauptverfasser: Cardell, Jason A., Mathis, John S., Ebbets, Dennis C., Savage, Blair D.
Format: Artikel
Sprache:eng
Schlagworte:
Astrophysics
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Zusammenfassung:We report on the detection of the weak intersystem transition of semiforbidden C II 2325 A in the sight line toward Zeta Oph using the Ech-B mode of the Goddard High-Resolution Spectrograph. The measured equivalent width of the semiforbidden C II line is W(lambda) = 0.52 +/- 0.12 mA, implying a C II column density of 1.80 (+/- 0.42) x 10 exp 17 atoms/sq cm and (C/H) sub Zeta Oph = 1.32 (+/- 0.32) x 10 exp -4.
ISSN:0004-637X
1538-4357
DOI:10.1086/186689